The lang 's' is representit in Unicode bi the sign U+017F in the Latin Extended-A range, an mey be representit in HTML as &#x17F; or &#383;.

∫abf,{\displaystyle \int _{a}^{b}f,}
the integral of f

The lang 's' survives in elangatit form, an wi a italic-style bowt descender, as the integral symbol ∫ uised in calculus; Gottfried Wilhelm von Leibniz based the chairacter on the Laitin word summa (sum), whilk he clarkit ſumma. This uiss first appeart for public in his paper De Geometria, publisht in Acta Eruditorum o Juin, 1686,[1] bit he haed uised it in private manuscripts syne at least 1675.[2]